Which term describes insects whose wings develop externally?

Which term describes insects whose wings develop externally?

• A. Endopterygote
• B. Haplotypic
• C. Exopterygote
• D. Apterygote

Answer: (C)

Wings developing externally is the hallmark of exopterygotes. In these insects, the wing buds appear on the outside of the body and grow as the insect molts through its immature stages, often without a pupal stage. This pattern accompanies incomplete metamorphosis, where nymphs resemble adults and gradually gain full wings with each molt until the final form is reached. In contrast, endopterygotes form their wings inside the body from imaginal discs during larval life and only reveal them after a pupal stage, as part of complete metamorphosis. Apterygotes are wingless, so they never develop wings at any stage. Haplotypic is unrelated to wing development, so it doesn’t describe insect wing formation.

Wings developing externally is the hallmark of exopterygotes. In these insects, the wing buds appear on the outside of the body and grow as the insect molts through its immature stages, often without a pupal stage. This pattern accompanies incomplete metamorphosis, where nymphs resemble adults and gradually gain full wings with each molt until the final form is reached. In contrast, endopterygotes form their wings inside the body from imaginal discs during larval life and only reveal them after a pupal stage, as part of complete metamorphosis. Apterygotes are wingless, so they never develop wings at any stage. Haplotypic is unrelated to wing development, so it doesn’t describe insect wing formation.